Automatic positioning of an X-ray source by way of segmentation

Abstract

At least one example embodiment provides a method for automatic positioning of an X-ray source of a medical X-ray system with a mobile X-ray detector. The method includes determining an examination region of the examination object, acquiring a position and a location of the examination object and the examination region by way of an optical position determining system, localizing the examination region, ascertaining a field point of the central ray of the X-ray source and a collimator size of the X-ray source based on the localized examination region, and automatic positioning of the X-ray source based on the field point and the collimator size.

What is claimed is: 
     
       1. A method for automatic positioning of an X-ray source of a medical X-ray system with a mobile X-ray detector, the method comprising:
 determining an examination region of an examination object; 
 acquiring a position and a location of the examination object and the examination region by way of an optical position determining system; 
 localizing the examination region; 
 ascertaining a field point of a central ray of the X-ray source and a collimator size of the X-ray source based on the localized examination region; and 
 automatic positioning of the X-ray source based on the field point and the collimator size. 
 
     
     
       2. The method as claimed in  claim 1 , wherein the localizing includes:
 creating a patient model of the examination object based on the acquisition of the examination object by way of the optical position determining system, 
 segmenting the patient model based on the determined examination region, and 
 localizing the examination region in the patient model. 
 
     
     
       3. The method as claimed in  claim 1 , wherein the localizing includes:
 creating a patient model of the examination object or an image data set of the examination object based on the acquisition of the examination object by way of the optical position determining system, and 
 localizing the examination region by way of a trained evaluating method based on a machine learning method. 
 
     
     
       4. The method as claimed in  claim 1 , wherein a location of the X-ray detector is ascertained based on the location of the examination object, a patient model or the localized examination region. 
     
     
       5. The method as claimed in  claim 1 , wherein the location of the X-ray detector is ascertained by way of angle sensors of the X-ray detector. 
     
     
       6. The method as claimed in  claim 1 , wherein a movement of the examination object is acquired by way of the optical position determining system. 
     
     
       7. The method as claimed in  claim 6 , wherein a renewed acquisition and a renewed localization of the examination region is carried out and the positioning of the X-ray source is corrected based on the renewed localization. 
     
     
       8. The method as claimed in  claim 1 , wherein the localized examination region is displayed on a display unit or by way of a light field projected onto the examination object. 
     
     
       9. The method as claimed in  claim 1 , wherein the central ray of the X-ray source is aligned at pre-determined angle to the examination region, based on the examination region or an examination type. 
     
     
       10. The method as claimed in  claim 1 , wherein the central ray of the X-ray source is aligned substantially perpendicular to the X-ray detector. 
     
     
       11. The method as claimed in  claim 1 , wherein the central ray of the X-ray source deviates from an alignment substantially perpendicular to the X-ray detector and an image correction of an X-ray recording is carried out in respect of the deviation. 
     
     
       12. The method as claimed in  claim 1 , wherein a proposal for position correction of the examination object is output. 
     
     
       13. An X-ray system for carrying out the method of  claim 1 , having:
 an X-ray source with an optical position determining system; and 
 a mobile X-ray detector. 
 
     
     
       14. A non-transitory computer program product having a computer program, directly loadable into a memory apparatus of a control apparatus of an X-ray system, including program portions to cause the control apparatus to perform the method of  claim 1  when the computer program is executed in the control apparatus of the X-ray system. 
     
     
       15. A non-transitory computer-readable medium storing program portions, configured to be read in and executed by a computer unit, to carry out the method of  claim 1  when the program portions are executed by the X-ray system. 
     
     
       16. The method as claimed in  claim 2 , wherein a location of the X-ray detector is ascertained based on the location of the examination object, the patient model or the localized examination region. 
     
     
       17. The method as claimed in  claim 2 , wherein the location of the X-ray detector is ascertained by way of angle sensors of the X-ray detector. 
     
     
       18. The method as claimed in  claim 2 , wherein a movement of the examination object is acquired by way of the optical position determining system. 
     
     
       19. The method as claimed in  claim 18 , wherein a renewed acquisition and a renewed localization of the examination region is carried out and the positioning of the X-ray source is corrected based on the renewed localization. 
     
     
       20. The method as claimed in  claim 2 , wherein the localized examination region is displayed on a display unit or by way of a light field projected onto the examination object.